From: Herbert Xu <herbert@gondor.apana.org.au>
To: Jeff Garzik <jgarzik@pobox.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [I810_AUDIO] 10/x: Fix reads/writes % 4 != 0
Date: Sun, 23 Nov 2003 22:04:01 +1100 [thread overview]
Message-ID: <20031123110401.GA15665@gondor.apana.org.au> (raw)
In-Reply-To: <20031123000202.GA9424@gondor.apana.org.au>
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This patch removes another bogus chunk of code that breaks when
the application does a partial write.
In particular, a read/write of x bytes where x % 4 != 0 will loop forever.
--
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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Index: kernel-source-2.4/drivers/sound/i810_audio.c
===================================================================
RCS file: /home/gondolin/herbert/src/CVS/debian/kernel-source-2.4/drivers/sound/i810_audio.c,v
retrieving revision 1.17
diff -u -r1.17 i810_audio.c
--- kernel-source-2.4/drivers/sound/i810_audio.c 23 Nov 2003 00:34:22 -0000 1.17
+++ kernel-source-2.4/drivers/sound/i810_audio.c 23 Nov 2003 10:59:46 -0000
@@ -1487,15 +1487,6 @@
if (cnt > count)
cnt = count;
- /* Lop off the last two bits to force the code to always
- * write in full samples. This keeps software that sets
- * O_NONBLOCK but doesn't check the return value of the
- * write call from getting things out of state where they
- * think a full 4 byte sample was written when really only
- * a portion was, resulting in odd sound and stereo
- * hysteresis.
- */
- cnt &= ~0x3;
if (cnt <= 0) {
unsigned long tmo;
/*
@@ -1643,15 +1634,6 @@
#endif
if (cnt > count)
cnt = count;
- /* Lop off the last two bits to force the code to always
- * write in full samples. This keeps software that sets
- * O_NONBLOCK but doesn't check the return value of the
- * write call from getting things out of state where they
- * think a full 4 byte sample was written when really only
- * a portion was, resulting in odd sound and stereo
- * hysteresis.
- */
- cnt &= ~0x3;
if (cnt <= 0) {
unsigned long tmo;
// There is data waiting to be played
next prev parent reply other threads:[~2003-11-23 11:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-22 7:09 [I810_AUDIO] 1/x: Fix wait queue race in drain_dac Herbert Xu
2003-11-22 7:13 ` [I810_AUDIO] 2/x: " Herbert Xu
2003-11-22 7:19 ` [I810_AUDIO] 3/x: Remove bogus CIV_TO_LVI Herbert Xu
2003-11-22 8:22 ` [I810_AUDIO] 4/x: Clean up with macros Herbert Xu
2003-11-22 8:26 ` [I810_AUDIO] 5/x: Fixed partial DMA transfers Herbert Xu
2003-11-22 8:39 ` Herbert Xu
2003-11-22 23:51 ` [I810_AUDIO] 7/x: Fix OSS fragments Herbert Xu
2003-11-22 23:53 ` [I810_AUDIO] 8/x: Remove divides on playback Herbert Xu
2003-11-23 0:02 ` [I810_AUDIO] 9/x: Fix drain_dac loop when signals_allowed == 0 Herbert Xu
2003-11-23 11:04 ` Herbert Xu [this message]
2004-01-17 3:58 ` [I810_AUDIO] 11/x: Fix dead lock in drain_dac Herbert Xu
2004-01-11 21:04 ` [I810_AUDIO] 2/x: Fix wait queue race " Jeff Garzik
2003-12-18 7:23 ` [I810_AUDIO] 1/x: " Jeff Garzik
2004-01-11 21:00 ` Jeff Garzik
2004-01-12 9:46 ` Herbert Xu
2004-01-12 21:48 ` Jeff Garzik
2004-01-12 22:26 ` Herbert Xu
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